Stumped by the Code?
Jul 1, 2006, By Mike Holt, NEC Consultant
Q. Is GFCI protection required for a single-phase, 208V, 30A coffee maker receptacle in a commercial kitchen?...
Code Quiz
Jun 20, 2006, By Steven Owen
What is the minimum acceptable voltage at a fire pump motor’s terminals, when the 460V-rated motor is supplied with an operating voltage of 480V, and the motor is operating at 115% of the full-load current rating of the motor?...
Code Q&A
Jun 20, 2006, By Mike Holt
Q. When determining the placement for receptacles in a dwelling, is the wall space behind a door required to be considered?...
Code Violations Illustrated
Jun 12, 2006,
Code Q&A
Jun 12, 2006, By Mike Holt
Code Quiz
Jun 12, 2006, By Steven Owen
When installing wiring from a fire pump controller to a fire pump motor, which of the following wiring methods is not permitted?...
Article 700: Emergency Systems
Jun 1, 2006, By Mike Holt, NEC Consultant
Essentially, emergency systems are lifelines for people, and Art. 700 is all about keeping those lifelines from breaking. The Article's main goal is to...
Illustrated Catastrophes
Jun 1, 2006, By Joe Tedesco, NEC Columnist
As usual, never consider the following commentary associated with these photos as a formal interpretation of the National Electrical Code (NEC). Without...
Code Quiz
May 24, 2006, By Steven Owen
An existing corporate data center is concerned about possible loss of power due to the fact that it is supplied by only one service. The existing feed consists of a 1600A, 208Y/120V, 3-phase, four-wire service. Data center management personnel propose to add an additional service....
Code Q&A
May 24, 2006, By Mike Holt
Code Quiz
May 11, 2006, By Steven Owen
According to 110.16, certain information is required on the label when marking switchboards, panelboards, industrial control panels, meter socket enclosures, and motor control centers....
Code Q&A
May 11, 2006, By Mike Holt
Stumped by the Code?
May 1, 2006, By Mike Holt, NEC Consultant
All questions and answers are based on the 2005 NEC. Q. I have six 18-foot metal poles to install in a parking area. Is a ground rod required at each...
NEC and IECC: Friends or Foes in the Lighting Arena?
May 1, 2006, By Steven Owen, National Code Seminars
Is there a positive relationship between the National Electrical Code (NEC) and the International Energy Conservation Code (IECC) in the area of lighting,...
Illustrated Catastrophes
May 1, 2006, By Joe Tedesco, NEC Columnist
As usual, never consider the following commentary associated with these photos as a formal interpretation of the National Electrical Code (NEC). Without...
Power to the Pump
May 1, 2006, By Mike Holt, NEC Consultant
One of the principal NEC requirements for circuit protection is that you shut down the equipment rather than let supply conductors melt from overload....
Code Quiz
Apr 24, 2006, By Steven Owen
Excluding exceptions, what is the requirement for cabling work space, which includes a requirement for a clear work space not less than...
Code Q&A
Apr 24, 2006, By Mike Holt
Code Quiz
Apr 11, 2006, By Steven Owen
What is the minimum number of 20A branch circuits required for a guest suite of a hotel or motel, which consists of the following...
Code Q&A
Apr 11, 2006, By Mike Holt
